Can you add additional properties to .NET serialized NULL values?

问题

In .NET, you can serialize a nullable element using XmlElement( IsNullable = true ), which results in this:

<SomeElement xsi:nil="true" />.

However, I need to be able to add xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance after any field that is being nulled out.

Example:

<SomeElement xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>

Is this possible?

回答1:

I figured it out. Here is the answer:

[XmlElement(IsNullable = true, Namespace = "http://www.w3.org/2001/XMLSchema-instance")]

来源：https://stackoverflow.com/questions/9639312/can-you-add-additional-properties-to-net-serialized-null-values